Teat cup for milking machines



F. A. GESSLER TEA'I CUP4FOR MILKING MACHJQNES Filed Dec. 29, 1944 grl v v INVENTOR FREDERICK AGESSLER Patented Oct. 1, 1946 m suse ES OFFICE 2,408,39d1- J. I

i t Frederick A. Ge'ssler, Des nets, medians;

.by mesne (assignmentato' GlobeMilken-Inc Des Moines, Iowa, a corporationof Illinois j gApplication neeei'nberza. mit s'enei No. 571L436 I 4 Claims.

" i This invention relates' for mechanical milking machines and in particu- 1er to "a' tea'tcup of the type including a casing or a housingwith an inflation'supportedin a spaced relation within the 'casing'.

'Anobject-"of'this invention is toprovide an improved teat cup for mechanical milking machines. 'A'iurther object'of this'invention' is .to provide a two piece teat cup for a pulsation type milking machine comprised of'a casing and an associated rubber liner integrally formed with a milk tube and a pulsation tube,'in" which thecas'ingand a liner are-of a simple and inexpensive-design,and relatively constructed to be quickly and easily asv p sembled and takenapart.--- A 7 Further objects, features and advantages of this invention will become apparent from the following description when taken in connection with the accompanying drawing in which:

Fig. 1 is an elevational view of the teatcup of this invention showing the casing and substantially all of the liner in section;

Fig. 2 is an elevational view of the liner; and

Fig. 3 is a sectional view taken along the line 3-3 in Fig. 1.

With reference to the drawing the teat cup of this invention is shown in Figs. 1 and 2 as comprising a metal tubular casing or teat cup shell 5, of a cylindrical shape,'integrally formed with an outside peripheral bead 6 at its upper end, and a series of inside axially spaced pressed-in annular ridges 1 adjacent its lower end. It is thus seen that the inside diameter of the tubular casing 5 is the same throughout its length except for the inwardly projected ridges I at its lower end.

The liner for the teat cup is composed of a flexible material such as rubber or the like and is integrally constructed with an inflation 8 having an enlarged head portion 9 at its upper end and a' base member, indicated generally as l I, adjacent its lower end. The head portion 9 is formed with an undercut annular recess l2 adapted to receive the bead 8 in fluid tight engagement.

The base ll includes an annular body member l3 having an annular projection or flange Mat its upper end, and merging at its lower end into a milk tube l6 and a pulsation tube H, which are connected together in a side by side relation. The

pulsation tube l1 extends through and is open to the top side of the body member l3, which top side defines the bottom of an air chamber I5, while the milk tube extends through the body member l3 for fluid communication with the lower end of the inflation 8 As best appears in Figs. 1 and 3 the flange I4 is of a diameter subgenerally toteat cups stantiallyfequal to the inside diameter of the tubular-casing 5 for a purpose which will appear.

later. Y

' In the assembly of the teat cup, the milk tube.

It and pulsatior'r tube 11' are inserted into the upper end of the tubular casing 5 and then pulled outwardly from the lower end of the casing to position the inflation 8 in a spaced relation within the casing to form the air chamber l5. This pulling action initially seats the peripheral bead 8, at the upper end of the casing 5; within the undercut recess [2. As the pulling action is continued the-inflation 8 is extended or stretched downwardly until the peripheral edge of the flange M. is 'in abutting en agement, with the under side of a ridge 1. The inflation 8 is thus fluid sealed at its upper end with the casing 5 by the engagement of the bead 6 within the recess l2 and at its lower end by the engagement of the flange M with a ridge 1.

When the liner is new a fluid seal of the lower end of the inflation 8 is accomplished with the upper one of the ridges 1. In use some of the stretch in the inflation 8 is lost and at such time it is necessary to stretch the inflation 8 to engage the flange M with the lower one of theridges 1. After the stretch in the inflation 8 is lost so that a fluid seal is not obtainable at'its lower end with any of the ridges 1, the original liner is replaced with a new one. As is clearly illustrated in Figs. 1 and 2 that portion of the body member l3, below the flange I4, is of a slightly reduced diameter relative to the flange l4, and acts to support and reinforce the flange l 4, in an operative position with a ridge I, against undesirable distortion and axial flexing movement.

In the operation of the teat cup the milk tube I6 is connected with a closed milk receptacle (not shown), which is generally under a partial vacuum. The pulsation tube I1 is connected with a pulsator (not shown) generally included as a part of the milking machine. A cow's teat is insertable within the inflation 8 at its upper end. The air chamber l5,'between the inflation 8 and the casing 5, is then alternately placed under atmospheric and sub-atmospheric pressure by the action of the pulsator, whereby the inflation 8 is in turn alternately squeezed and then released from a cows teat, with the pressures being applied inflation 8 through the milk tube l6.

Although the invention has been described with respect to a preferred embodiment thereof it is to be understood that it is not to be so limited since cut recess adapted to receive said peripheral head; 7' and including a base member comprised of a milk 7 tube, a pulsation tube and an annularpro ecnon; said projection comprising two; portions of dif-' ferent thicknesses transversely of theQlinen-wi'thjacent thereto and the reinforcing structure having therein a passageway from fluid other than milk.

3. In a teat cup of the type described comprising a tubular outer casing and an inner flexible liner wherein the liner is maintained in operative position within the casing by friction means, said frictionmeans comprising a series of parallel beads on'said casing and an annular projection on said liner comprising two portions of different thicknesses transversely'of the liner, with the portion ofrgreater thickness having its peripheral edge adapted to frictionally engage one of the portion of greater thicknesshaving a 'diameter substantially equal tothe inner diameter of said casing so that the peripheral edges thereof is adapted to abut against one of said a-nnular ridges, and the portion of lesser thickness constituting a reinforcing structure to prevent undesirabledistortion of the projection whn inoperative position with one of said ridges, with said two tube be g termi ted. subs antia ly. at. ai p j tion and e nded therethro gh, I l

, In a teat cup of the type described comprising a tubular outer casing and an inner flexible liner wherein the liner is maintaine in operative position relative to the casing by friction means, said friction 1 means comprising parallel beads on the casing, and :at least one bead on the liner, said one bead having adjacent thereto reinforcing structure to, support the'bead, W ni operative position within the ;c'as.ing, \fr om being materiallvdistorted, the bead having closelyadsaid. beads, and the portion of lesser thickness constituting a1reinforcing structure to prevent undesirable distortion of the projection when in said irictionally engaged position, said projection having therein a passageway for fluid other than milk.

4. In a teat cup of the type described comprising a tubularwouter casing of a straight cylina h e avin t o dmingsa the opposit 

